5. ADJUSTMENT
５. ADJUSTMENT
CAUTION
Maintenance and inspection of the sewing | If the power switch and air need to be left on | ||||
machine should only be carried out by a | when carrying out some adjustment, be | ||||
qualified technician. | extremely careful to observe all safety | ||||
Ask your Brother dealer or a qualified | precautions. |
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electrician to carry out any maintenance and | Hold the machine head with both hands when | ||||
inspection of the electrical system. | tilting it back or returning it to its original | ||||
Turn off the power switch and disconnect the | position. Furthermore, after tilting back the | ||||
power cord from the wall outlet at the following | machine head, do not push the face plate side | ||||
times, otherwise the machine may operate if | or the pulley side from above, as this could | ||||
the foot switch is depressed by mistake, which | cause the machine head to topple over, which | ||||
could result in injury. | may result in personal injury or damage to the | ||||
∙ When carrying out inspection, adjustment | machine. |
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and maintenance | Use only | the proper replacement | parts as | ||
∙ When replacing consumable parts such as | |||||
specified by Brother. |
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the rotary hook and knife |
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If any safety devices have been removed, be | |||||
Disconnect the air hoses from the air supply | |||||
absolutely | sure to | to | their | ||
and wait for the needle on the pressure gauge | |||||
original positions and check that they operate | |||||
to drop to “0” before carrying out inspection, | |||||
correctly before using the machine. |
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adjustment and repair of any parts which use |
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Any problems in machine operation which | |||||
the pneumatic equipment. | |||||
| result from | unauthorized modifications | to the | ||
machine will not be covered by the warranty.
3450Q
2553Q | 2721Q |
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<When using a DP x 17 needle>
Turn the machine pulley to move the needle bar to the lowest position. Then remove the rubber plug (2), loosen the set screw (3) and then move the needle bar up or down to adjust so that the second reference line from the bottom of the needle (reference line A) is aligned with the lower edge of the needle bar bush (1).
<When using a DP x 5 or TQ X1 needle>
Turn the machine pulley to move the needle bar to the lowest position. Then remove the rubber plug (2), loosen the set screw (3) and then move the needle bar up or down to adjust so that the highest reference line (reference line a) is aligned with the lower edge of the needle bar bush (1).
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